Pneumatics (SP)

looking to build my first pneumatic...

Hey all,
I'm finally going to take the plunge and build something pneumatic, most likely a body slinger. I've been researching it for a while, but I still seem to have more questions than answers at this point. Basically, I'm looking for a site with a simple diagram of a pneumatic system, its components, and their functions. Also, if you know of a place where I can purchase these components for less $$, that would really help!
thanks,